I had been loading 57gr H4831 with the 150s before I got a chronograph. Until I checked, they were only shooting 2750fps. I also had been using 65gr H4831 with a 160gr bullet in my 7mm Rem Mag, and found it only shooting 2925fps. RL23 has that same rifle and bullet shooting 3100fps now. I've switched all these loads from H4831 over to RL23
